Appeal No. 95-1640
Application 07/752,138
The claims are directed to a process for the preparation
of a high-temperature stable monoalkylated lubricant fluid or
lubricant additive and also to the lubricant fluid.
Claim 31 is illustrative of the subject matter on appeal
and reads as follows:
31. A process for the preparation of a high-
temperature stable monoalkylated lubricant fluid or
lubricant additive comprising catalytically reacting
in the presence of a zeolite catalyst selected from
the group consisting of zeolite beta, zeolite Y,
ZSM-12 and MCM-22 (1) a hydrocarbyl substituent
precursor, having at least one olefinic group and
optionally containing S, N, O, P, F, or mixtures
thereof, and (2) a thianthrene and wherein said
hydrocarbyl substituent is selected from the group
consisting of alkyl, alkenyl, alkynyl, arylalkyl, or
aryl, cyclic or linear containing from 3 to about
500 carbons wherein the reaction temperature varies
from ambient to about 350 C, the molar ratio of saido
hydrocarbyl substituent precursor to thianthrene
varies from 1:1 about 10:1 and the amount of
catalyst varies from 5 to about 100 grams of
catalyst to about 1 mole of thianthrene.
The reference relied upon by the examiner is:
Forbus et al. (Forbus) 5,171,915 Dec. 15, 1992
Claims 31, 34, 35, and 38-42 stand rejected under 35
U.S.C. § 102(e) as anticipated by and under 35 U.S.C. § 103 as
unpatentable over Forbus. We reverse both rejections.
Opinion
2
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